After selecting a layer, you may want to copy it to a new document where you can save it as a separate image.
选择一个图层后,你也许想把它复制到新文件中从而把它存储为一个新的图片。
Anyway, copy and paste this image into a new layer in photoshop.
总之,复制粘贴这张照片到Photoshop的新图层中。
In fact, since this file system is a "copy on write" file system, it knows exactly what the new files are, so it can efficiently package just the parts you added into an "image" layer.
事实上,因为这个文件系统是一个“写时复制”文件系统,它知道新的文件是什么,所以它可以有效的包只是部分你添加到“图像”层。
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